METHOD OF PREPARING SULFUR- AND NITROGEN-CONTAINING ADDITIVES Russian patent published in 2004 - IPC

FIELD: lubricants.

SUBSTANCE: invention relates to synthesis of additives used in production of process lubricants efficient in cold working and suitable for preserving lube oils. Additive potassium comprises reaction of (i) mixture of C₂₀-C₃₀-α-olefins with vegetable fats at weight ratio (10-74):(13-54) with (ii) sulfur at 130-150^оС in presence of 0.9-7.5% catalyst to give sulfurized product, said catalyst being dialkyl dithiophosphate zinc salt expressed by formula

wherein is isobutyl and R' isooctyl. Sulfurized product is then treated at 100-130^оС with fatty amine fraction C₁₀-C₂₀ in amount 3-13%.

EFFECT: omitted necessity in subsequent processing and recovery of catalyst, and increased anticorrosion activity of additive in unfriendly aqueous media.

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